// The Nova Project by Ken Beckett.
// Copyright (C) 2007-2012 Inevitable Software, all rights reserved.
// Released under the Common Development and Distribution License, CDDL-1.0: http://opensource.org/licenses/cddl1.php
using System.Collections.Generic;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using Nova.CodeDOM;
namespace Nova.UI
{
/// <summary>
/// The view model for a <see cref="CodeDOM.While"/>.
/// </summary>
public class WhileVM : BlockStatementVM
{
#region /* STATICS */
internal static void AddViewModelMapping()
{
CreateViewModel.Add(typeof(While),
delegate(CodeObject codeObject, bool isDescription, Dictionary<CodeObject, CodeObjectVM> dictionary) { return new WhileVM((While)codeObject, isDescription, dictionary); });
}
#endregion
#region /* FIELDS */
protected ExpressionVM _conditionalVM;
protected DoWhileVM _doWhileVM;
#endregion
#region /* CONSTRUCTORS */
/// <summary>
/// Create a view model instance for the specified <see cref="CodeDOM.While"/>.
/// </summary>
public WhileVM(While @while, bool isDescription, Dictionary<CodeObject, CodeObjectVM> dictionary)
: base(@while, isDescription, dictionary)
{
_conditionalVM = (ExpressionVM)CreateVM(@while.Conditional, isDescription, dictionary);
_doWhileVM = (DoWhileVM)CreateVM(@while.DoWhile, isDescription, dictionary);
}
#endregion
#region /* PROPERTIES */
/// <summary>
/// The underlying <see cref="CodeDOM.While"/> model.
/// </summary>
public While While
{
get { return (While)CodeObject; }
}
/// <summary>
/// The conditional <see cref="ExpressionVM"/>.
/// </summary>
public ExpressionVM ConditionalVM
{
get { return _conditionalVM; }
}
/// <summary>
/// True if there is a conditional <see cref="CodeDOM.Expression"/>.
/// </summary>
public bool HasConditionVM
{
get { return (_conditionalVM != null); }
}
/// <summary>
/// The <see cref="DoWhileVM"/> part if this is a 'do/while' loop.
/// </summary>
public DoWhileVM DoWhileVM
{
get { return _doWhileVM; }
}
/// <summary>
/// True if this is a 'do/while' loop.
/// </summary>
public bool IsDoWhile
{
get { return While.IsDoWhile; }
}
#endregion
#region /* METHODS */
#endregion
#region /* RENDERING */
public override Brush BorderBrush
{
get { return DarkLavender; }
}
public override Brush BackgroundBrush
{
get { return Brushes.Lavender; }
}
/// <summary>
/// Determines if a 'while' with a null condition should be rendered as 'do'.
/// </summary>
public static bool DisplayAsDoIfNullCondition;
protected override void RenderStatement(CodeRenderer renderer, RenderFlags flags)
{
renderer.RenderText((IsDoWhile || (!HasConditionVM && DisplayAsDoIfNullCondition)) ? While.ParseTokenDo : While.ParseToken, KEYWORD_BRUSH, this);
if (!HasConditionVM && !DisplayAsDoIfNullCondition)
{
// Render a null condition as "while (true)" if the 'do' option isn't on
RenderFlags passFlags = (flags & RenderFlags.PassMask);
RenderArgumentPrefix(renderer, passFlags);
bool showParens = Statement.HasArgumentParens && RenderParens();
if (showParens)
renderer.RenderText(CodeDOM.Expression.ParseTokenStartGroup, PUNC_BRUSH, this);
Literal literal = new Literal(true);
CreateVM(literal, this).Render(renderer, passFlags | RenderFlags.ForceBorder);
if (showParens)
{
if (Statement.IsEndFirstOnLine)
renderer.NewLine();
renderer.RenderText(CodeDOM.Expression.ParseTokenEndGroup, PUNC_BRUSH, this);
}
}
}
protected override void RenderArgument(CodeRenderer renderer, RenderFlags flags)
{
if (_conditionalVM != null)
_conditionalVM.Render(renderer, flags);
}
protected override void RenderAfter(CodeRenderer renderer, RenderFlags flags)
{
base.RenderAfter(renderer, flags);
if (IsDoWhile)
_doWhileVM.Render(renderer, flags | RenderFlags.PrefixSpace);
}
public override void RenderVisible(CodeRenderer renderer, RenderFlags flags)
{
base.RenderVisible(renderer, flags);
if (_conditionalVM != null)
_conditionalVM.RenderVisible(renderer, flags);
if (_doWhileVM != null)
_doWhileVM.RenderVisible(renderer, flags);
}
public override void UnRender()
{
if (_conditionalVM != null)
_conditionalVM.UnRender();
if (_doWhileVM != null)
_doWhileVM.UnRender();
base.UnRender();
}
#endregion
#region /* COMMANDS */
public static readonly RoutedCommand DisplayAsDoIfNullConditionCommand = new RoutedCommand("Display While as Do if Null Condition", typeof(WhileVM));
public static new void BindCommands(Window window)
{
WPFUtil.AddCommandBinding(window, DisplayAsDoIfNullConditionCommand, displayAsDoIfNullCondition_Executed);
}
private static void displayAsDoIfNullCondition_Executed(object sender, ExecutedRoutedEventArgs e)
{
DisplayAsDoIfNullCondition = !DisplayAsDoIfNullCondition;
CodeRenderer.ReRenderAll();
}
#endregion
}
}